Computing and printing scale



' '0. IIIIMI:sin'.v4 COMPUTING AND yPRINTINGA SCIILEn APPLICATION FILEDMAR. 22, I9I6.

Patented Mar'. 30,1920.

0. MALCHER. COMPUTING AND PRINTING SCALE.

APPLICATION FILED MAR. 2z, 1916.

L335,@69 Patented MA1. 30, 1920.,

' *5 i2 SHEETS-SHEET 2.

@NJW 0. MALCHER.

COMPUTING AND PRiNTING SGALE.

M'PucATxoN FILED 111111.22, 1916.

0. MALCHER.

COMPUTING AND PRINTING SCALE.

APPLICATION FILED MAR. 22, |916.

Patented Mar. 30, 1920.,

12 SHEETS-SHEET 4.

- o. MALGIHER. COMPUTING AND PRINTNG SCALE.

APPLICATION FILED MARt 22, 1916. 1,335,069. Patented Mar. 30, w20.

12 SHEETS-SHEET 5.

0. IVIALCHER.

COMPUTING AN D PRINTING SCALE.

APPLICATION FILED MAR. 22, T916. 1,335,069. Patented Mar. 30,1920.

` I2 SHEETS-SHEET 6.

0. MALCHER. COMPUTING AND PRINTING SCALE.

Patented Mar. 30, 1920.

APPLICATION FILED MAR` 22, I9I6. 1,335,069.

I2 SHEETS-SHEET 7.

o. MALHER..` COMPUTING AND PRINTINGSCALE. APPLICATION FILED MAR. 22V,I9I6.

Patented Mar. 30, 1920.

I2 SHEETS-SHEET 8.

0. MALCHER.

COMPUTING AND PRINTING SCALE.

APPLICATION FILED MAR. 22 1916.

1,335,069, h Patented Mar. 30,1920.

l2 SHEETS-SHEET 9.

0. MALCHER.

COMPUTING AND PRINTING SCALE.

APPLICATION FILED MAR. 22, I9I6.

Patented Mar. 30, 1920.

l2 SHEETS-SHEET l0.

6 Z I oII I Inl'llll I II l Tl ll ll Il ll lli.

II ll Il'llllll Il O. MALCHER.

COMPUTING AND PRINTING SCALE.

APPLICATION FILED MAH. 22. 191e.

Patented Mar. 30, 1920.

l2 SHEETS-SHEET Il.

O. MALQIIER. ,Y COMPUTING AND PRINTING SCALE.

Y APPLICATION FILED MAR. 22, I9I6. 1,335,069, Patented Mar.30,1920.

I2 SHEETS-SHEET I2.

UNITED vSTATES PATENT carton.

OTTO MALCHER, OF CHICAGO, ILLINOIS, ASSIGNOR-TO MALCHER ADDING MACHINECOMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

COMPUTING- AND PRINTING SCALE.

Application filed March 22, 1916.

l (filly/om z' m f1.1/ concern.'

le it known that I, OTTO MALCHER, aof the United States, residing at inthe county of Cook and State rois, have invented certain new andimprovements in Computing and Scales, of which the following is a tmention.

s Envention relates to a computing and n .g device designed especiallyfor use tonnection witlfweighing scales7 and, for its object theimprovement and simi, ncation of devices of this character, and theprovision of a machine that shall he commercially practicable. Theinvention is ext iiiplitied in the combination and arrangement of partsshown in the accompanying drawings and described in the followingspecification. and it is more particularly pointed out in the appendedclaims.

In the drawings. Figure l is a fragmentary front elevational view withparts broken away. of one end of a scale mechanism embodying the presentinvention: llig. 2 is a view similar to Fig. l showing another portionof the same device: l"ig. is a horizontal sectional view of a portion ofthe machine taken through the central axis of the price gears; Fig. alis a frag. mentarv horizontal cross sectional view taken substantiallyon line wle-4 of Fig. L): Fig; :'i is a view similar to Fig. 4 taken online i-i of Fig. i2: Fig, o is a fragmentary end elevation of a portionof the machine slunving the operating handle and associated inechanism:lilig. Tr a fragmentary sectional view taken on line T T of Fig. 1: Vig.n a detail sectional view taken on line HMH of Fig. l with partsomitted: Fig. f is a vertical sectional view shinving the detailedconstruction of the drive shaft for the counter and the associatedparts: Vig. lo s a detail view showing the stop wheelsfor he price keys:"ig: ll is a side elevation At one ol' the wheels shown in 'lfigx lll:Fig. 2 is a fragmentary vertical sectional view showin; the printingmechanism: llig. 1? is a fragmentary horizontal sectional view showingthe operating handle and driving guiars: llig. tt is a fragmentarysectional riew through the axis of the operating shaft: Fig. is avertical sectional view showing details of the operating gearing: Fig.'ill is a horizontal .sectional view show- Specification of IettersPatent.

Patented Mar. 30, 1920. Serial No: 85,950.

ing a. shifting device forming a part of the invention; Fig. 17 is afragmentary detail showing a scale arrangement used in connection withthe device; Fig. 18 is a fragmentary perspective view showing the pricekeys and cooperating mechanism; Fig. 19 is a detailed perspective viewshowing a trip device forming part of the invention; Figs. 20 and 2l aredetail views with parts omitted showing portions of the handle clutchmechanism; and Fig. is a detail view of a holding dog and associatedparts.

To assist in understanding the relations and operation of the variousparts of the mechanism, a brief general description of the entiremachine will first he given before the various parts are taken up indetail. The invention is designed to be easily adapted to forms ofweighing` mechanism now common, in which the weighing levers of a scaleare made to rotate a shaft or drum an amount proportional to the weightof an article placed upon the scale pan. The particular form of theweighing device itself forms no part of the present invention, Theinvention. however` is arranged to cooperate with the drum or shaft ofscales of the character referred to and to he controlled thereby withoutin any way interfering with the delicacy of such scales. and withoutinjury to the hearings provided for their movable parts. The onlyconnection tothe movable part ofthe scale proper is through a disksecured to the end of the scale shaft and arranged to he rotated hy theweight on the pan an amount proportionate to the weight. rl`he disk hasa trip stop secured to its surface hut rotates freely without contactingwith any of the parts of the computing mechanisni. li'hen the computingmechanism is to be operated` the disk is held in place by a clamp whichreceives thc force exerted upon the trip stop b v the operation of thecomputing mechanism and prevents the transmission of any strain to thehearings of the scale itself.

The computing mechanism includes a series of price gears the number ofteeth on the different gears being proportional to the price per poundwhich the particular gear represents. These gears are all coaxial andrigid with one another and are given a complete revolution for eachcomputing opera` tion. A transmission mechanism is pro- -Supported bythese be selectively connected price gears and these gears to videdwhich may with any one of the various which transmits motion from acounter of well known construction carrie on and operated by acountershaft. By this connection, the amount of rotation of thecountershaft at any operation is made to be proportional to the pricerepresented by the particular gear with which the transmission mechanismis connected. By another system of mechanism, the connection between theprice gears and the counter is broken after the price gears have rotatedan amount proportional to the weight of an article upon the scale pan.This mechanism is controlled, in a manner which will be described, bythe trip stop on the disk carried by the scale shaft. Through thismechanism, the amount of rotation of the counter is made to beproportional to the weight on the scale pan.' is thais apparent that twofactors enter into the control of the amount of rotation of thecountersliaft; namely, the price per pound of the article, and the totalweight of the article. It is therefore only necessary to properlyproportion the gear mechanism to make the counter read directly in termsof the total value of the article on the scale pan, since the samefactors enter into the total value of the article, namely the weight ofthe article and the price-per pound. The figures on the counter arerepresented by raised characters and mechanism is provided to take animprint of these figures after a computing operation, in order that aprinted ticket may A the article being weighed. Mechanism is alsoprovided to enable the operator to give a customer an amount 0f anyparticular value up to one pound, as, for instance, fifteen cents worthat thirty nine cents per pound. Mechanism is also provided for printingon the customers tic et, the price at which the article is being soldand also for exhibiting to customers and others in the room, the weightof the article and the price per pound.

Key-board.

The mechanism is set to compute the value of an article at anyparticular price per pound, by means of a key board provided with aseries ous prices. The drawing illustrates a machine provided with keysrepresenting various prices from eight to forty cents per pound. anismwill be best understood by reference to Figs. 1, 2, 3, 4, 7 and 18. Theframework of the machine upon which the various mechanism is supported,comprises a series of upright web members designated by the numerals 20,21, 21", 22, 23 and 24.

web members and extending longitudinally of the front portion hold thekey be secured giving the value of of keys representing the vari-VConstruction of the key boai'd mechlevers Q5 are each provided withfinger pieces d. Q6 which bear numerals designating the prices which theparticular keys represent. Extending longitudinally of the machine infront of the key shaft a is a web member 2 provided with guide slots 28through whil the key levers pass upper edge with an inwardly bent web29. Secured to the web 29 are a plurality of coil springs 30 the lowerends of which springs are .secured to projections 31 formed on thc keylevers 25. The springs 30 normally levers in their uppermost position incontact with a universal shaft 32 ou which are pivotally mounted arms 33carrying a universal lock bar 34. Each key lever is provided with a pairof notches 35 and 36 with which the bar 34 cooperates to hold the keysin their different positions.

Extending longitudinally of the machine, below the shaft a and the keylevers 25, is a shaft b mounted to rotate in the supporting webs of theframework. This shaft b is shown in detail in Fig. 10 and has rigidlysecured thereto an enlarged portion 37 provided with a spiral groove orkeyway 38. plurality of disks 39v (Fig. 11) are mounted on the portion37 of the shaft Z) and each disk has an inwardly projecting lug 40 ar-Iranged to coperate with the keyway 38, and an outwardly projecting tooth41 arranged on the same radial line with the lug 40. These disks 39 areslid into position'on the shaft b and are secured in place by end disks42 and 43. It will be apparent that when all of the disks are assembledon the shaft, the various teeth 41 will be arranged spirally about theshaft, all of the teeth being disposed at equal angular distances fromone another. The disks are spaced from one another by sleeves or collars44, and are arranged the same distance apart as the key levers 25, therebeing one disk for each key. The teeth 41 project from the theirrespective disks in position to be intercepted by the projections 31 onthe keys Q5 when the keys are depressed as will be apparent from Fig.18. The shaft I), as viewed in Fig. 7, rotates in 'a counter-clockwisedirection during this operation. The arrangement is such that if thelowest priced key is depressed, there will be but a small amount ofrotation before the key intercepts its corresponding disk, but if keysrepresenting higher prices are depressed, the amount of rotation of theshaft b will be correspondingly increased before the depressed key in-`tei'cepts its corresponding disk.

Adjacent the supporting frame web Q2, the shaft b has rigidly securedthereto a beveled gear 45 (Fig. 1) which meshes with a beveled pinion 46carried on a shaft 47 mounted for rot: tion in a bearing 48 carand alsoprovided at its neeaoca the rack longitudinally on the shaft 5l throughthe train of gearing decribed, an amount proportional to the amount ofrotation of the shaft ZJ and determined by the particular price gearoperated to limit the rotation of this shaft. The amount of longitudinalmovement of the rack 50 controls the gear connection between the pricegears and the counter, in a manner which will be later describe Themechanism for rotating the shaft b will best-be understood from Fig. 4or the drawing. Secured to the end of the Shaft b adjacent the tramemember 23 is a pinion a rack bar 53 mounted to slide vertically on theweb member 23 and held in place by a guide 54. A spiral spring 55 isconnected to the up er end of the rack bar 53 and tendsnormal y to drawthe bar upwardly. The amount of upward movement or the bar is limited bya pin 56 secured to the frame 23 and projecting through a slot 57 in therack barindicated by broken lines in Fig. 4.' A second rack bar 58,provided with a spring 59, is imposed upon the bar 53 for the purpose ofreturning the bar 53 to its initial position after each operation, bymechanism to be later described. The rack bar 53 is provided-with teeth60 which mesh with the teeth on the pinion 52 and which rotate thepinion and shaft in a counter-clockwise direction whenthe rack is movedupwardly by the spring 55. rlhe rack is normally held against upwardmovement by a detent 61, shown in Fig. 18 and in broken lines in Fig. 4,which engages a notch in the end disk 42 and holds the shaft h fromrotation. A spring 63 draws' the detent 61 against the disk 4,2. Thedetent 61 is pivotally'mounted on the shaft a and is rigid with auniversal bar 62 which-is also pivotally carriedby the shaft a and whichextends longitudinally of the key board in a position just ,beneath thekey levers 25. lt will he readily understood Jfrom Fig. 4 25 isdepressed, the bar 62 will be rotated about the shaft a. and thedetent'61 forced out of engagement with the disk 42, thus releasing theshaft h and leaving it free to rotate under the influence of the rack 53and spring 55. Before the detent 61 moves out of engagement with notch,the projection 31 on' the depressed key will have moved into position to.intercept the tooth 41 on its corresponding disk, so that when theshaft b is released, it will rotate until stopped by the projection 31on the particular key depressed, the amount of ro- 52 which meshes withthat when any one of the keysl its coperating i tion, as viewed intation thus bein limited to an amount correspondmg to t e pricerepresented by the particular .key operated.

Handle meclzam'em.

The handle mechanism by which the operating parts of the machine aredriven, is best shown in Figs. 6, 13, 14, 20 and 21. A handle lever 65,as shown in these figures, is mounted externally of the frame member 24and is rotatably carried on the shaft c. The outer end of the shaft o isjournaled in a bar 66 carried on pins 67 and 68 projecting laterallyfrom the frame member 24. Froje'ctingfrom lthe side of the handle 65toward the supporting bar 66, is apivot pin 69which carries a pair ofhooked clutch members 70 and 71. rlhe clutch member 70 nearest thehandle bar 65, is arranged to cooperate with a ratchet disk 72 which isrigidly secured to the shaft c by a pin 73, (Figs. 13, 14 and 2,1).rllhe clutch member 71 coperates with a ratchet member 74 which is looseon the shaft c but which is secured vto a mutilated gear wheel 75 by apin 7 6. The ratchet member 72 has rigidly i secured thereto andcontiguous therewith, aI second ratchet member 77 which coperates with aholding dog 78, Fig. 21, which prevents backward movement of the tworatchet members and the shaft c. A similar dog 79 (Fig. 20) coperateswith the ratchet member 74 to prevent backward movement ci that ratchetandthe gear 75.4 The upper ends of the clutch members 70 and 71 areconnected by a spiral s ring 80 which forces the hooked portions o' theclutch members into contact with their respective ratchets. When thehandle lever is drawn forwardly, or to the left, as shownv in Fig. 6,the clutch 71 will Contact with the ratchet 74 and rotate the-ratchettogether with the mutilated gear' 7 5 in a counter-clockwise direction.The amount of rotation is about 90, or a quarter of a revolution. `@nthe return stroke of the handle lever, the clutch will engage theratchet 74 and rotate the shaft o a quarter of a. revolution, in aclockwise direction, as viewed in F ig. 6. As will be seen from isarranged to mesh with the segmental gear 81 secured to the shaft ai'.This shaft a? carries at its opposite end, as shown in Figs. 5 and 13, apinion 82 which meshes with a pinion 83' of equal size carried on thecam shaft e. By means of this gearing, the shaft d is rotatedthrough'lBOO during the forward movement of the handle lever, and thisrotation is imparted to the shaft e which is given a correspondingrotation j through 180 in a counter-clockwisedirec- Figs. 5 and 6. Theshaft e carries a series of cams for operating various parts of thedevice, as will be explained later. The shaft c has rigidly securedthereto at its Fig. 6, the mutilated gear l the gear 75 and arrangedtocontact with a gear segment 86 similar to the segment 81 but carrieddirectly on the cam shaft e. During the return stroke of the handlelever 65, the shaft c as previously explained, will be given a quarterturn in a clockwise direction, as viewed in Figs. 5 and 6, an duringthis quarter turn a. section `of gear teeth on the gear wheel 85 willcontact with the gear segment 86 and impart' a half turn to this segmentand the cam shaft e in a counter-clockwise direction, as viewed in Figs.5 and 6, which is the same direction of rotation which is imparted to itthrough the shaft d on the forward stroke of the handle. It will thus beseen that for each complete handle operation., the shaft e will be givena complete rotation, one half of the rotation being imparted to it ateach stroke of the handle. The shaft e carries a disk 87 provided withop'positely disposed notches 88 and 89. A detent 90 is resiliently heldin contact with the disk 87 by means of a spring 91, and is providedwith a pointe end 92 which is forced into contact with the notches inthe disk 87 to hold the shaft c in position after each half turn of thatshaft. The beveled shape of the notches in the disk 87 permits thedetent 90 to be forced out of contact with these notches when force isexerted upon the shaft c to rotate the same.

As shownin Fig. 6, the handle lever carries with it an arcuate rack 93which is arranged to be drawn into mesh with a gear wheel 94 secured tothe end of the shaft h which carries the price gears, as will beexplained. The shaft h has also rigidly secured thereto, a disk 95provided wit a beveled notch 96 in its periphery, which coperates withthe beveled end detent 98 pivoted at 100 on the frame member 24, andprovided with a spring 101 by which it is resiliently held in contactwith the disk 95. During the forward movement of the handle 65, the rack93 will contact with the gear 94, forcing the detent 97 out of contactwith the notch 96 and imparting a `complete rotation to the gear v94 andthe shaft h on which the gear is mounted. As the handle continues tolmove in its forward direction, the rack 93 will leave the gear 94,which will be held in the position to which it has been rotated by thedetent 97 again entering the notch 96 in the disk 95. During the returnstroke of the handle 65, the

l rack 93 will again come into mesh with the 'gear 94 and impart asecond rotation to the Vshaft h but in the opposite direction to that inwhich it was rotated during the forward movement of the handle. i

. Scale. Either betere or after-the price ley is deassenso inner-end, amutilated gear 85 similar-:to r pressed, and before the handle isoperated,

being sold is placed upon the scale pan. yThe scale mechanism may be ofany well known or usual construction and is not shown in the drawing. Itis sufficient to say that the scale levers are so arranged that the rackbars 150 and 151 are moved a distance proportional to the weight of thearticle on the scale pan. These bars, as shown in Fig. 1', areA arrangedto rotate pinions 152 and 153 respectively secured to the shaft 154which is mounted in bearings in the frame members 21 and 21 of themachine. These bearings may be of a suitable construction to insure freeand easy rotation of the scale parts as they are not subjected to anystrain due to the computing mechanism. The shaft 154 carries a scaledrum or disk 145 which is divided into scale divisions representingpounds and ounces. In the scale shown in the draw-ing, provision is madeto Weigh articles of a weight u-p to twenty-four ounds. The shaft 154 isextended to the right, as shown in Fig. 1, and is provided at its endwith a disk' 155 (see also Fig. 8). The disk 155 has a trip stop 156extending from one face thereof and arranged to control the computingmechanism in a manner to be described. Ehe trip stop 156 may beoounterbalanced by properly proportioning the parts of the disk 155, orin any other suitable manner, so that the stop will not affect thecorrect weighing of the scale proper. lt is easily seen that the partsto be moved by the weight of the article may the article be made verylight so that they will in no Lock: for saaie disk.

After the article is placed upon the scale pan and the scale yhas cometo rest, and after the proper price key has been depressed, theattendant pulls the 'operating handle for wardly and the first edect ofthis movement is to clam the disk 155 rigidly in the posi tion 'to w ichit has .been moved by the weight upon the scale pan. The mechanism rforaccomplishing this result will best be understood from Figs. 1,4 3 and8. As soon as the handle starts to move forwardly, the cam shaft e willbegin to rotate in a counterclockwise direction as viewed in lig. 8,this rotation being produced by the mechanism previously described.Rigidly mounted on the shaft e is a cam disk 160. Bearing on the disk169 is a lever' 161i pivotally mounted are entirely any part of thecomlar pinion 165 secured to the shaft 166 which Y is mounted forrotation in the web members 167 and 168. Rigid with the shaft 166, is aspur gear 169 which meshes with a similar gear 170 rigidly secured tothe shaft 171 alsomounted for rotation in the web members 167 and 168.Secured tothe ends of lthe shafts 166 and 171 respectively, opposite thegears 169 and 170, are pinions 172 and 173. These pinions mesh withsliding racks 174 and 175 respectively which are mounted on a shaft 176carried in the frame members 2l and-22 and which are held from rotationon the shaft 176 by pin and slot connections, as 'shown in Fig. 1. Thesliding racks 174 and 175 are provided with clamping jaws 177 and 178respectively, which jaws are located on opposite sides of the disk 155and are arranged to rigidly clamp the disk, when moved toward oneanother. A spiral'spring 180 is secured to the lever 161 and normallydraws the lever downwardly and toward the cam shaft c. The first effectofthe rotation of the cam shaft e is to permit the bearing point 181 ofthe lever 161 to move off the shoulder 182 of the cam 160 under theinfluence of the spring 180, and thus to cause rotation of the pinion164, which in turn rotates the shafts 166 and.171 and moves the clampingjaws 177 and 178 toward one another to securely lock the disk 155 inposition. It'should be noted that. although the clamping jaws 177 and178 firmly hold the disk from rotation, they are caused to contact withthe disk in such a way that they do not produce any strain upon thebearings of the shaft 154.

Price gears.

In order that the counter may be driven an amount proportional to thevarious prices at which articles are sold, a series of price gears 190is provided. These gears, as shown in Figs. 2 and 3, are made ofdifferent diameters, the various diameters being proportional to thedifferent prices at which the scale is designed to compute values. Inthe particular embodiment of the invention shown in the drawings, eachgear is provided with one tooth for eachthree cents worth of the highestvalue it is capable of computing. Although this is not an essentialarrangement, it is one that produces convenient proportions andillustrates the principle involved. The largest gear shown in thedrawing, represents a price of forty cents per pound, and since thescale is designed to weigh articles up to twenty four pounds,

this gear will have one third of twenty four tlmes forty, or threehundred twenty teeth. The vI leat adjacent gear will have one third oftwenty four times thirty nine, or three hundred twelve teeth. The othergears are proportioned to the various prices which they represent, thesmallest one shown in the drawing representing veight cents per poundand havingtherefore siXty four teeth. The counter or register to bedescribed is arranged to be selectively driven by the price gears, thegear ratio being such that the counter will register three cents foreach tooth on the price gear. A complete revolution of a price gear willtherefore register three times as many cents as it has teeth, which isthe value of twenty four pounds at the price the particular gearrepresents. Partsof a. revolution will of course registercorrespondingly proportional values.

The gears are all rigidly secured together and to a sleeve 191 mountedfor free' rotation on the shaft it. The gears are rotated by the shaft tthrough the medium of an arm 192 mounted on the shaft and rigidly heldthereto by a collar 192. As shown in broken lines in Fig. 5, the arm 192is ybifurcated at its end and one of the prongs of the bifurcation isprovided with an adjustable set screw 193. A lug 194 projects from theface of the end gear 190 between the bifurcations of the arm 192, and bythis means the gears 190 are turned whenever the shaft it is rotated.There is, however, a small amount of lost mot-ion between the shaft hand the gears 190. The amount of this lost motion can be adjusted bymeans of the screw 193, and the reason for it will appear later. v

Uotmter.

Yto be described, is' provided at one end, as

shown in Figs. 2 and 9, with a well-known form of counter device,indicated generally by the reference numeral 195, for measuring thenumber of revolutions made by the shaft. The counter 195 is providedwith a series of disks 1196, 197 and 198,-which correspond to units,tens and hundreds orders respectively, of'the numbers representing thevalues computed'. Each disk 1s provided .with raised figuresrepresenting the digits fro-n1 zero to nine, and in order that a printedimpression may be taken from. these digits and appear in the properposltion on the printed ticket, the diglts are reversed on each disk,and in order that the dlgits may r(appear in their proper order, theyare also inverted on the disks, so that the vtlcket when printed willneed to be turned around to bring the units order to the rlght and thethousands order to the left. rlhe units disk 196 is driven directly bythe shaft g and a carrying mechanism of well known construction connectsthe various disks, so that for each revolution of one disk the disk next4is a casing with a star vvhl 211.

' earn 214; carried on a cani `gear adjacent onv thelett thereof will bemoved one tenth oi a revolution. Counters of this character are Wellknown and are carried in stock by the trade.

' The shaft g is journl'aled at the end adjacent the counter, in thetrame member 23, and the opposite end of the shaft is provided with asliding clutch 199 which is journaled in the frame member 22, as shownin Figs. 9 and 22. Adjacent the counter 200 which inoloses a star Wheel201 secured to the shaft g. rllhe casing 200 is provided with a slot 202through which the beveled end 203 of the dog 2041 (Fig. 4) projects. Thedog a is pivotally carried on the trame member 23 and is provided with aspiral spring 205 which normally tends to draw the point 203 away fromthe star Wheel 291. The dog is held in contact with the star Wheel bymeans ot a cam 206 on the dislr 20'?r secured to the cam shaft e. Whenthe dog is in contact with the star Wheel, it straightens the numeralson the counter 195 and properly alines them in Zero position'.

Secured to the frame member 23 on the side opposite the counter 195, ishollow journal 208 which has rotatably mounted thereon a gear drum 209whichv is provided With a clutch extension 210 having a clutch member atthe end thereof arranged to co'- operate with the clutch member 199slidably mounted on the shaft g. Vlhe drum 299 is provided at the endadjacent the traine 23, The star Wheel 211 is provided with a dog 212(Fig. 5), having asprinir 213 which normally draws the dog away rom thestar Wheel. The dog is forced into contact with the star Wheel by a. 215secured to the cam shaft e. The drum 299 is provided With a detachablehead 218 which is held in place by a collar 217. This arrangement isprovided in order to facilitate assembling of the parts on. the iournal298. Tit will be seen that when the clutch member 199 is connected withthe member 210, rotation of the drum 209 will be transmitted to theshaft g and thence to thel counter 195., The clutch member 199 carries astar Wheel 218 (Figs. 9 and 22) provided with a flange or rim 219eistendingo entirely around the star Wheelon one side thereof. is rigidWith-,the clutch member 199, which, although tree to slide on thev shaftg is prevented trom turning thereon by a pin 220.

The star vvheel 218 is provided with a dogV 221(Figs. 3, 5 and 22).rl`he dog-i221 has a projection or pin 222 at the end thereof whichrests yupon the rim 219 of the star Wheel 218 and prevents the dogI tromcontacting vvith the notches of the Wheel `when the clutch member 199 isin contact with the copeiatingclutch member 210. vWhen the clutch member199 is moved' to the left, in

shaft 239 in the bearing,1 lugs.

rlhe Wheel Figs. 3 and 9, the lu 222 is free to pass the rim 219 andpermit t ie point of the dog 221 to come into engagement` under theinuence of a spring 223, With the teeth of the star wheel 218. Thepurpose of this arrangement will appear later.

Hatch operating melia/Imm.

rlFlie 'mechanism for operating the clutch 199 Will best be understoodby reference to F igs. l, 3, 8 and 19. Botatably mounted in lugs 225 and226 carried by the frame mem.- ber 22,`is a gear shait 227 provided atits lower end With an angular projection 228.. The shaft also carriespinions 229 and 230.

The pinion 229 meshes with the .circular rack 231 or' the sliding clutchmember 199. Vlllhe'pinion 230 meshes with a similar circular rack 232slidably mounted on the shaft h. As shown inFigs. 8 and 19, the angularprojection 228 on the shaft 227 normally contacts with the lateralsurface of the cam 233 secured to the shaft e. rllhe arrangement is suchthat at the first part oit' the rotation of the shait e, the member 228is released, leaving the shaft 227 free to rotate under the intluenceoia spiral. spring 234, through a chain ot mechanism Which will novv bedez, scribed. T he spring 234i, as shown in Figs. -1 and 8, has one endsecured to a pin 235 carried by an arm 233 secured to the shaft h. ylFhearm 236 is provided with a pair of bearing lugs 237 and in which isjournaled a shaft 239 carrying a pin 2410 having the opposite 'end otthe springv 2311 secured thereto, will be seen that the tension ot thespring 23anormally tends to 239 has a pinion 241 secured to the upperend thereot and a beveled pinion 2452 at 'its lower end. The pinionmeshes with tne circular raclr 232 mounted on the shaft it and sincethis raclr meshes also with the pinion 230 onz the shaft 227, which isheld from movement by the cam 233 and angular projection 228, it will beapparent that the sha't't 239 is normally held from rotation by the cam233, butV that as soon as the shaft e be- ,gine to rotate and theextension 228 is released, the spring 23a will rotate the shatt 239 andhence will shift the clutch member 199 into engagement with the member210 rotate the.)

through the train ot gearing described. The

arm 230 is provided at its extremity with a stud shaft 24;-3 which isprovided at one end pinion 242 and at the opposite end with a disk 2115provided with a triangular-shaped contact iinger 2id VThe tinger 2% isnormally held in the retracted position/shown in Fig. 8, by theoperation of the clutch disk 233 through the mechanism previouslydescribed. This permits the scale disk 155 to vibrate freely past zeroposition during the Weighing operation it it is caused to do so.

with a beveled pinion 244i meshing' 'with the 4 is best shown in Figs.2, 3 and 5.

When the cam disk 233 through rotationl of the shaft e releases theshaft 227,` the contact linger 246 is rotated by the spring 241 into aposition to point radially away from the'shaft It. en so moved, thecontact linger is in positionto coperate with the trip stop 156 whenwill now. be apparent that when the cam shaft e begins to rotateimmediately after the disk 155 is locked by the clamping jaws 177 and178, the shaft 227 will be released, which will be rotated by the spring234 to move the clutch 199 into engagement with the clutch member 210carried by the gear drum 209, and also to shift the contact nger 246into position to coperate with the trip stop 156 as soon as the shaft lais rotated by the handle lever in the manner previously described. Itwill also be apparent that immediately following the movement of theshaft 227, the dogs 204 and 212 will be released by their respectivecams 207- and 215 and will be drawn by their springs away from the starwheels 201 and 211, and the shaft g and the drum 209 will thus bereleased and made free to rotate after the drum 209 has "been placedinto driving relation with the shaft g through the medium of the clutch199. The cam 247 which engages the tail of the dog 221, holds the end ofthis dog out of contact with the star wheel 218 until after the clutchmember 199 has been moved into contact with its coperating member 210.Immediately after thisoccurs, the cam 247 will be-suiiciently rotated torelease the dog forced toward the star wheel 218 by the spring 223. Thedog will be prevented from .engaging the star wheel however, because ofthe fact that the clutch is now in the` proper position to cause theflange 219 to be engaged by the projection 222, which will thus hold thedog 221 out of contact with the star wheel. The dog 221 will continue inthis relation until the clutch is again moved to the left, as viewedengage the clutch from the gear drum 209 or a purpose which will appearlater.

Shifter?) Ze gear train,

In order that rotation of the price gears 190 may be transmitted to thegear drum 209 and thence to the counter 195, a train of gearing carriedby a shiftable gear fra-me is arranged in such a way that the drum 209maybe selectively connected with any one of the price gears 190. Thistrain of gearing rlhe shifta'ble gearing referred to is mounted on aframe 250 which is pivotally supported at its lower end on the shaft 51and which is rigidly secured tothe circular sliding rack 50, aspreviously pointed out. The frame 2,50 has journaled therein a shaft 251which is provided at its lower end with a beveled the'shaft z, isrotated. It.

(Fig. 3). 4This cam 221, which will then bel in'Figs. 3 and 9, to dis-lgear 252 meshing with a beveled inion 253 journaled on the shaft 51.The,s aft 253 is rigidly secured to the spur gear 254 by means oflacollar 255. The spur` gear 254 meshes with the gear drum 209 and remainsin driving relation with the drum as the frame'250 is slidlongitudinally of the shaft 51. The upper end of the shaft v251 isprovided with a pinion 256 which meshes with a gear 257 carried rigidlywith a shaft 258 mounted for rotation in the upper end of the frame 250.The shaft 258 extends beyond -the frame 25() and is provided at itsouter end with a pinion 259 which may be swung into and out ofengagement with the price gears 190. As shown in Fig. 5, the frame 250is provided with a tail piece 260 carrying a cam roller 261 at the endthereof. The roller 260 contacts with a cam guide 262 j guide is soshaped that it will hold the pinion 259 a fixed distance from the pricegears 190 vas the frame 250 is moved longitudinally on the shaft 51. Theweight of the frame normally tends to move the pinion 259 away from theprice gears,` andthe extent of this movement is limited by the camvroller 261 and the cam guide 262. he cam guide 262 is supported by anarm 263, secured to the frame member 23 and bent to avoid contact withthe gear mechanism. As previously explained, the gear frame 250 isadjusted longitudinally on the shaft 51 through the medium of thecircularrack' 50 and the gears 45, 46 and 49 when one of the price gearsis depressed, the amount of movement of the frame being determined bythe particular key depressed, and being suicientlto bring the pinion 259lcpposite the price gear correspondmgto that The frame 250 is providedwith a second tail piece 264 (Fig. 5) which carries a cam roller 265 atits lower end in position to coperate with a series of cam disks 266(see also F ig. 3). These disks are carried on the cam shaft e and areprovided with a continuous circular cam surface throughout the greaterpart of. their circumference. Each of the disks, however, has a.depressed portion 267 of sullicient length to permit the frame 250 toremain in its retracted position until the clutch 199 has been operated.Ai'- ter this operation has taken place, but before the dogs 204 and 212have been released, the cam roller 265 rides lonto the continuoussurface of the disk 266 and the frame 250 is rotated about the shaft 51`to move the pinion 259 into contact with the gear opposite which it hasbeen positioned b f the depression of the price key. rlhe pinion willcon.- tinue to remain in mesh with the price gear, held so by the disk266 during the remainder of the rotation of the cam shaft lt will benoted that the cam disks 266 are graded 1n size to correspond to thevarious angles at which the frame 250 is held bythe cam i guide 262.Itis important that the gear drum 209 and the price gears 190 be hel-dfrom rotation during the adjustment of the 250, in order that theinitial position of these parts may always be the same at the beginningof a computing operation, and also in order that the pinion 259 may bein position to properly mesh with the teeth of the gears 190 when theframe' is swung to bring the pinion into meshing position. For thisreason the dogs 204 and 212 are permitted to remain in contact withtheir respective star wheels until after the 15 pinion 259 is broughtinto mesh with the gears 190. The gears 190` are meanwhile held in fixedposition by a detent268 pivotally mounted on the frame member 22 (Figs.2 and 4) and which bears in a notclifin a plate 269 secured tothel'ateral surface of the outer price key 190. The detent 268 isresiliently held in contact with the plate 269 by a spring 270. By thisarrangement,

the gear drum 209 and the price gears 19() at their initial positions,and it is merely a matter of arranging these gears when the machine isassembled in order to assure proper meshing of the gears 190 with pinion259 when they are moved into coperative relation with one another.

After driving connection is' established between the price gears and thecounter, in the manner described, 204 and 212 have been released torender the gearing freely operable, the rack carriedby the lever handlewill engage the gear on the shaft 71. in the manner reviously described,and will cause this sha to make a complete rotation in a clockwisedirection, as viewed in Fig. 5. rllhe shaft will rotate a slight amountdue to the gap between the bifurcations Aof the arm 192, before rotationof the price gears will begin. As soon as the set screw 193 engages thelug 194, however, the price gearswill be picked up by the arm 192, thedetent 268 will be forced from its notch in the plate 269, and the pricegears will be carried around with the shaft it. rlfhe rotary movement ofthese gears will be transmitted through the shiftable gear trainfto thecounteiI 195, where the rotation of the counter disks will beproportional to the number of gear teeth on the particular price carrywith it the arm 236 secured to the end thereof, together with thecontact member 246, which as has been previously pointed out, willoccupy a radially extending position, so that its path of 'travel willcause it to strike the trip stop 156 when the arm 236 has rotatedthrough an angle equal to that through which the disk 155 has beenrotated by the weight on the scale pan. 151s soon as always have a fixedrelation to one another.

and after the dogs vmitted t0 rotate ear with which the pinion 259 is incontact.

s the shaft h continues to rotate, it will A the contact finger 246strikes the tripstop 156, the contact finger will be rotated against thetension of the spring 234 attached'to the shaft v239. The rotation ofthe shaft 239 will slide the circular rack 232 on the shaft h, whichsliding movement will in turn rotate the shaft 227, causing the pinion229 coperating with the rack 231, to move the clutch 199 longitudinallyof the shaft g, thus disengaging the clutch and the shaft g from thegear drum 209. Afterthe gear drum has thus been disconnected, it willcontinue to be rotated by the price gears during the remainder of therotation of the shaft h, but since the counter is driven by the shaft g,the driving connection will be broken between the price gears and thecounter as soon as the shaft la has rotated an amount proportional tothe amount lof rotation of the scale disk 155. As soon as the clutch 19985 is moved out of engagement with the cooperating member 210, theprojection 222 on the dog 221 will move off of the flange 219 and thedog will be snapped into contact with the star wheel 218 by the tensionof the spring 223. lin this way the rotation of the shaft g and thecounter 155 will be immediately stopped, at the same time that theconnection is broken with the price gears and the shaft g will be truedup by the beveled end of the dog 221 contacting with the beveled notchesof the star wheel 218, so that the counter will be stoppedy with thenumerals in alinement and set at the nearest unit of value correspondingto the amount of rotation of the scale disk. The clutch 199 will be heldin its disengaged position by the end of pin 222 bearing against thevange 219.

1t will loe apparent from an inspection of 105 the drawings, especiallyFig. 8, that some time will be required after the contact finger 246strikes the lug 156 before it will be moved into the position shown inFig. 8 which position it must reach before -the clutch 199 isdisconnected from its coperating member 210. The shaft h is thusperthrough a small angle in excess of the amount of rotation of thescale disk 155, before the counter has its connection broken with theprice gears. llf no correction were made for this, the counter wouldregister a greater value than that warrantedby theamount of rotation ofthe 'scale disk. -lt is for the purpose of correct- 120 ing this errorthat the arm 192 is bifurcated, and the shaft h, is'permitted to rotatea small amount before rotation of the price gears and consequentrotation of the counter is permitted to begin. By the adjustment of thescrew 193, this preliminary rotation of the shaft it may be made toequal exactly the amount of rotation required to operate the clutch 199.lin this way the angular movement of the shaft h during which it 13

